[Elecraft] K2/100 RS232 trouble
Geert Jan de Groot
pe1hzg at xs4all.nl
Thu Sep 16 13:54:36 EDT 2021
> The problem of using a standard cable with the serial port is not that
> it might fail to operate as a serial port, but rather than it might
> permanently destroy the (non-RS232) internal signalling within the
> transceiver.
...
> In fact there seem to be two pins that are used for signals that cannot
> tolerate RS232 voltages.
The K2 "A to B mod" has some modifications that at least seem to reduce
some of the damage. I don't remember it being announced as such, but
reviewing the mod status of my K2 after some time found some snippets I
had not seen before.
Things still would not work and I am not sure the K2 is fully protected
but some protection is added and the damage should be less.
If you still did make the boo-boo, this link from LA3ZA may be useful:
http://folk.uio.no/sverre/LA3ZA/blog/K2/N0SS/k2_wrong_ser_cbl_damage.pdf
Geert Jan
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